Hey, ya'll! It is me again!
Able to start working on the 1995 Z/28 6-speed again... While off at work for these couple of months I had asked a nice individual to attempt to rewire the Manual fan switch to stock automatic... but instead he made it so that it is always on - he is not tracking how to put it back to stock.

Anyways, I will be back home soon for a couple of days and thought I will try to do it myself. I have looked at Shbox's fan diagrams but I feel too lost to start; the previous owner was the one who turned it into this janky manual switch. I understand that the fan speeds must go through the PCM and that there are 3 relays .... but that is about it.

Is there any way I can just buy a whole new cooling fan wiring kit and do it - or is there any dummy proof way of figuring this out. I love this car so much - have redone the entire ignition, fuel system, and rear gearing myself - but this is my biggest fear. All the help I could get would be amazing. Thank you all!

 

Your best bet would be to troubleshoot your actual system following the appropiate schematics.
There is this two speed fan control from BP Automotive that replicates your actual cooling circuit if you want to go that route: https://bp-automotive.com/product/du...fan-relay-kit/
You will have to tap into the PCM high and low speed signal wires to make it work.